package com.lxh.student.config;

import com.lxh.student.filter.JwtAuthenticationTokenFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.authentication.configuration.EnableGlobalAuthentication;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;


/**
 * @author lxh
 * @date 2023/4/4 21:56
 */
@EnableWebSecurity
@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)//方法运行之前进行相应校验
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    private static final String[] AUTH_WHITELIST = {
            "/swagger-resources/**",
            "/swagger-ui.html",
            "/v3/api-docs",
            "/webjars/**"
    };

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭csrf
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 只允许匿名访问
                .antMatchers("/teachers/login").anonymous()
                .antMatchers("/swagger-ui/*","/test","/test/*").permitAll() //不管登陆没，都能够访问
                .antMatchers(AUTH_WHITELIST).permitAll()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated();

        //把自定义的jwtAuthenticationTokenFilter放在UsernamePasswordAuthenticationFilter过滤器之前
        http.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
    }

    @Autowired
    private AuthenticationConfiguration authenticationConfiguration;

    @Bean
    public AuthenticationManager authenticationManager() throws Exception{
        AuthenticationManager authenticationManager = authenticationConfiguration.getAuthenticationManager();
        return authenticationManager;
    }

}

